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Thoracic Imaging |
1 From the Department of Radiology (S.J.C., M.B.R., F.C., R.E.S., D.M.H.) and the Interstitial Lung Disease Unit (A.U.W.), Royal Brompton Hospital, Sydney St, London SW3 6NP, England; and the Department of Respiratory Medicine, Sir Charles Gairdner Hospital, Nedlands, Australia (A.W.M.). Received August 1, 2000; revision requested September 13; final revision received February 5, 2001; accepted February 12. Address correspondence to D.M.H. (e-mail: d.hansell@rbh.nthames.nhs.uk).
PURPOSE: To identify a system for the quantification of pleural thickening with an acceptable level of interobserver variation and good functional correlation in individuals with pleural disease.
MATERIALS AND METHODS: The extent of pleural thickening and plaques was assessed in 50 patients by using the following: (a) a radiographic score based on the International Labour Office system, (b) a subjective simple computed tomographic (CT) score, (c) a subjective comprehensive CT score, (d) an objective nonautomated method, and (e) an objective computer-aided semiautomated method.
RESULTS: Similar correlations between the extent of diffuse pleural thickening and forced vital capacity were seen for each system (objective CT, r = -0.72, P < .001; simple CT, r = -0.69, P < .001; radiographic, r = -0.67, P < .001; comprehensive CT, r = -0.66, P < .001). Comparable correlations were observed for total lung capacity. After controlling for extent of diffuse pleural thickening, pleural plaque scores were functionally irrelevant.
CONCLUSION: Comparable functional-morphologic correlations were achieved by using different CT and radiographic scoring systems for pleural disease. A subjective simple CT system had the advantages of ease of application and potential to aid in the accurate assessment of the lung parenchyma, which may be important in individuals exposed to asbestos.
Index terms: Asbestos, 66.773 • Pleura, CT, 66.12118 • Pleura, diseases, 66.76, 66.773
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